Replying to box width

im making a box. how wide should i make the actual surface to slide on? i was thinking a foot.
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Jules: What does Marcellus Wallace look like? Brett: What? Jules: [pointing his gun] Say 'what' again. SAY 'WHAT' AGAIN! I dare you, I double dare you, motherfucker! Say 'what' one more goddamn time! Brett: He's b-b-black... Jules: Go on. Brett: He's bald... Jules: Does he look like a bitch? Brett: What? [Jules shoots Brett in shoulder] Jules: DOES HE LOOK LIKE A BITCH? Brett: NO! Jules: Then why you trying to fuck him like a bitch, Brett? Brett: I didn't! Jules: Yes you did. Yes you did, Brett. You tried to fuck him. And Marcellus Wallace don't like to be fucked by anybody, except Mrs. Wallace.
BFSC WE DO IT FROGGY STYLE